body {
  margin: 0;
}

#app {
  height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  background-color: skyblue;
  height: 50px;
  text-align: center;
  line-height: 50px;
  color: #fff;
}

section {
  flex: 1;
  overflow-y: auto;
}

footer {
  height: 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 8px;
  /* box-sizing: border-box; */
}


